问题
both have almost same input parameters:
int _ftprintf( FILE *stream, const _tchar *format [, argument ]...)
int fprintf(FILE *stream, const char *format, ...)
What is the difference between the two format agruments? When should I use each?
回答1:
_tprintf and _ftprintf are to be used with TCHAR format strings. TCHAR is just a macro, which unwraps into either char or wchar_t, depending on whether is the _UNICODE macro defined.
So, basically, if you don't have _UNICODE defined, _ftprintf will be equivalent to fprintf, otherwise it will be equivalent to fwprintf.
来源：https://stackoverflow.com/questions/35454005/fprintf-vs-ftprintf